Rotary explosive-engine.



P. .UHTBROGL ROTARY EXPLOSIVE ENGINE. APPLIULTION FILED SEPT. 25,1908.

.vllllsl F. UHTBRUCK. ROTARY BXPLosIvE ENGINE.

i 1,012, 1 15. APPLwATxoN FILED'BPT. 2 5, 19o, Patented Dea 1 9, 1911.

4 SHEETS-SHEET 3. F1a.: 3.

p /flllllll/ t WITNESSES INVENTOR F. UHTBROGK. ROTARY EXPLGSIVE ENGINE. APrLmATIoN FILED SEPT.25,190U

Patented Dc. 19,19114 Ivi/Niall) l: ,Will/[lll] 51mm VITNES'SES INVE/VTR ffm-@ fn@ mw@ FREDERICK UHTBROCK, OF NEW YORK, N. Y,

RQTARY EXPLOSIV'E-ENGINE.

pecication of Letters Patent.

Patented Dec. 19, 1h11.

Application led September 25,. 1908. Serial No. 454,817.

To all whom it may concern:

Be it knoivn that I, FREDERICK. Urrraooii, a subject of the German El'nperorgresidin at New York. in the county? and State o New York, have invented e new and useful Rotary Explosive-Engine, of which the following is a specification.

M v invention relatesI to rotari7 explosive engines, and the object of my invention is to provide a self-contained,` reversible, economical and controllable rotary explosive en ine.

` attain this object by a mechanism illustrated in the accompanying drawings, in Which- Figure l is a side-elevation of that side of mv engine. that contains the explosion chambers: Fig. Q is a vertical cross-section of Fig. l: Fig. 3 is a vertical longitudinal section on line M N in Fig. 2. as seen in the direction ol the arrow R: Fig. 4 is a vertical longitudinal section on line O P in Fig. Q, as seen in the direction of the arrow R in F ig. The same reference characters denote ythe same parts throughout' the .several vievvs.

The annular-ljv grooved rotor r is mounted rotatablv on the rim of the stator s. circumw ferentially surrounding the latter: the groove of the rotor r and the outer rilm of the stator s may be said to form the circular tube rs. The rotor r is provided with the three tapered pistons a. a? and r1.3, which divide the chamber rs into the three chambers bc. Furthermore the rotor r comprises the three partitions g, which divide the chambers be radially longitudinally into the explosion chambers l) and the compression chambers c. Each of the pistons a', a2 and ed inlet-valves d and fl. opposite the coinpress'ion chambers c (see Figs. t2 and 4), and with outlet-valves e and e. opposite the explosion chambers o (see Figs. 1, 2 and 3). `The valves e and e are plugvalvesQthey ex- "tend ivith one end through the Wall of the rotor 1. and are provided with cranks e, i' andA closed bv the springs e e are engaged by the Slotted ends of the The cranks flrlfcrumedA levers K. The levers K, that envided.` at their tree ends and their side fargage'the cranks e of the valves e, are proers q, the levers K, that engage lthe cranks e of the valves e', are provided, at their free ends and at. their side nearestwtoA the 45B body of the engine. with rollers gf. The rollers g are situated in a" lane diiferent from that of the rollers g- T ietwo puit-sof guides, p and p', are fastened to and carried by the rotor r, and preferably integrali-her@ with. The stator s has the form of a circular disk surrounded by a cylindrical ring, the ring forming the rim of the stator. The four lugs it are fastened to the stator s, to

and near the inside of the rim, and at! air' equal distance from each other. Each of the lugs lz. forms a frame for a radially reciprocatable abutment t', and holds tivo i'nductibnvalves n' and n, opposite the compression chambers c. aud tivo eXhaustLvalves. m and 70. .i

m, opposite the explosion chambers (Land the feed-conduits n and the exhaust-commits m. The. valves a.' and mf are situated at one side of the slide of the abutment i. and: the

valves a. andm are placed on the other75 side. Theconduits n conduct 4the explosive mixture lnto tle compression chambers@ b v Way of the valves n or 'a.,' thevconduits m receive the exploded gases by Way of thev exm The conduits u areas() haast-valves m' or securely fastened to the stator s and in the standard A; the conduits m support` the other side of the stator by Inieansof-the standard A. Each abutment-'i is provided with a cnt i. into which tit the partitions g,l

and tivo rollers 2', which -areengageddiv the guides p and p" in such .a manner thatthe guides p feed the abutments e into; the

chambers c and b, and that thegnides p guide the abntmetsout of the Wav7 oftheI 90 a is hollow and provided with spring-seatp pistons g. The shaft C runs throtghgthe center of the engine and turns in vbearings held bv the standards A and Af andthe disk of the stator s. Fastened onthe shaft C are the lever B and the wheels Ar, a" and 1l. 95

Pivoted to the Wheel r are the connectingrods o and r", which againV are connected to the cranks of the va ves vn and aff h v pins in such a manner, that they close the valves a. when they open the valves 11.-

and vice versa. 4The wieel is connected' with the cranks of the valves m and m bv means of the rods :r and au"` in thesaine manner as the vvheel o is connected ywith it is pressed into the the valves n aiid n. The valves yn will close when the valvesl m close. and the valves n will be actuated the same as the valves my. rl`he wheel u is provided with segmentarv projections and t; the projections are adapted to pnt the four contacts o in position 'to engage the rollers g4 of the levers K; the projections t' are adapted to put the contacts o in position to engage the rollers g. The contacts o and o aie set radiallv slidable on beds ir in such a manner, that the contacts oiare `situate in the same plane as the projections t an the rollers g. Vand the contacts o are situ ted in the same plane as the projections t' and the rollers q. Each ofthe contacts 0 and 0 is provided with an arm. which holds an electrical contact 2. The electrical contacts Q. held b v the arms of the contacts 0. are adapted to close an electrical circuit b v means of the rollers q'. after the latter have been disengaged from the contacts o. r1`lie electrical contacts 2, held b v the contacts o. are adapted to close a circuit b v means of the rollers q. The beds 1r are fastened to the lugs i. A spark-plug Z is situated near each valve e or e. and electriallvv connected with the roller (j or -q that bv means of its lever K controls said valve e or e. 4

The roller H is no part of my invention.

but it is a means to lessen the wear caused to the upper part ofthe rim of the stator by the weight of the rotor, or to transfer the movement of the rotor to a shaft.

The operation of niv engine may be exlained as follows: The rotor r is rotating in tliedirectioii of the arrows. the induction-valves 11 and the exhaust-valves la are open. the contacts 0 are in position to engage the rollers fj.- 'l`he guides p torce the abutments z' into the chambers 7) and c. the guides 7) guide the abutments ont of the way of the pistons u.l The piston u has just passed an abutment. Tinl part of the piston o', that faces the compression chamber c. sucks the gas-mixture into the space it creates between itself and. the abutment just passed. The space in front of the piston o' is shut ott b v the next abutment and has been lled with gas-mixture by the piston of; as the. valves n" are closed. there is no walv for the to escape,

piston a through the valve d.; lt will, be seen that each of the three pistons steadily sucks. the explosive mixture into the compression chambers c, and at the saine time compresses into its own chamber the mixture drawn in by the preceding piston. This "constitutes the .1ntake and compression process of my en ine and takes place at one side of the partitions y, while at the other side of said partitions the combustion and the exhausting process take place. The piston a' has just. passed and t.

an abutment i; t'lre contact o, situated near l said abutment. has intercepted the roller` Q (of the lever K, connected with the valve e of the piston (1'.) and b v means of the lever K and the crank e has opened the valve c; the gas. compressed into the piston a.' before the latter passed the abutment z', enters the space of the chamber between the piston a. and the abutment i.' as soon as the roller q' has passed the contact o. the spring c will close the valve'(7 the rollei` Q. swung back into its usual position, will be contacted b v the electrical contact Q, close the electrical circuit and cause the spark-plug to ignite the charge. llvhile driven .forward bv the expansion of the exploded gases. the piston u.' drives such gas as has been left in the chamber 7) fioin a yprevious explosion. through the exhaust-valve mi. lt will be seen that an explosion takes place every time. when a piston passes an abutment. As there are three pistons and four aliiitii'ieiits,`tlieie will be twelve explosions in one revolution of the rotor at twelve different times.

To reverse the engine` the lever B and by means of it the axis C and the wheels` u. .r and 1' are turned to, the left. Now the projections will release the contactsl n. which are drawn bv their springs out of the reach i of the rollers Q.' the valves e will not be opened an)v more and no more explosions can take place on that side of the pistons. The projections t will put the contacts o in position to engage the rollers g. so that the valves e inav be opened. and explosions may take place on the reverse side of the pistons. The valves n and m are closed and the valves fn and m are opened. The exploded gases in back of the pistons escape through the valves in. the gases in front of the pistons have no wav to escape. and they will form air-cushions which. when their resistance equalizes the momentum of the rotor, will rebound and start the rotor in the reverse direction. Then the `motor will take in explosive. mixture through the valves n. the pistons will take in the compressed mixture througli the valves d and give out charges through the valves e', and explosions will take place at the reverse side of the pistons a, the exploded gases will be exhausted through the valves `m.

To stop the engine in an economical way` the lever B may be turned only enough to disengage the contacts 0 or o', while the valves n or n and m or m are left p-.lrtlv open; then no more explosions will taire place, while the momentum of the rotor will continue =to compress explosive mixture or air into the pistons.r so that part of the surplus energy will be stored in the hollow pistons.

As a cooling means, D, and any cooling means may I .have shown the ribs be used, but

. "large sunffacei of .the en struction and arrangement of my invention Without departing froml the spirit 'and'scope of my inyention, ancljI thereforeclaimhe* fight to all'such I think that, under ordinary circumstances,- no extra cooling means is necessary, as avery gli-ne is rotating and exposed to the surrounding air.

.have shownnolubricating system, but an suitable system maybe used.

t is apfparent that many other variations and modi cations may be made in the con- I variations and modifications as" properly fall Within the scope of -my invention and the terms of the following claims.

Havin thus shown and described my invention claim anddesire to secure by Letters Patenb- I 1. In a rotary explosive engine; a stator formed by a circular disk with a cylindrical 'rim; an annularly grooved rotor circumferentiallysurrounding said stator and rotatably mounted on the rim of the latter and forming a circular chamber with the same; three hollow pistons integral with or fastened to said rotor and dividing the circular chamber formed by the rotor and the stator into three chambers; partitions carried by the rotor and the istons and located in the plane of the circu ar disk ofthe stator and running parallel to the sides of the rotor and dividing the chambers formed by the stator, the rotor and the pistons into compression and explosion chambers; inlet and outlet valves located in the pistons, the inlet `valves lfacing the compression chambers, and the outlet valves facing the explosion chambers; radially reciprocatable abutments provided with rollers and having cuts into which tit the before-mentioned partitions; four lugs integral with or fastened to the stator. forming frames for said abutments; valved feedorts situated oneA on either side of the rames of the abutments and leading into the compression-chambers; valved exhaust orts situated one on either side of the frames of the abutments and communicating with the explosion-chambers; guides carried by the rotor and adapted to guide the abutments into the compression and explosion chambers and out of the way ofthe pistons by means of the rollers fastened to the abutments; means to open the outlet valves of the pistons at and for a predetermined time; means to ignite the charges in the explosion chambers at the proper time; and means to open or to close the feed and exhaust valves and means to set in position the means that operate the outlet valves of the pistons; means of supply leading to the feed-ports and means to conduct the exhaust away from the exhaust ports; all substantially as de-l scribed.

2. In a rotaig' t exillosive en 'ne, a statorI fixedly mounte an formed y a circular disk surrounded by a cylindrical rim; an annulartly groovedi rotor circumferentially surroun ing saids'tator and rotatably mounted on the rim of 'the latter and. forming a circular chamber with the'same; one or more hollow pistons curriedby said rotor; and situated across the chamber fornledbythe stator and the rotor;h inlet andoutletnyalves situated in the pistenen-partitions carried by Ath'erotor and the pistons: extending in the direction of the radius and concentric with the rim of the stator, and dividing the Ichambers formed by the stator, thc rotor and the pistons into compression and explosion chambers in such a manner that the compression chambers run parallel to the exploslon chambers and both hare the same radius; the compression chambers facing the inlet Valves of the pistons, the explosion chambers facing the outlet valves of the pistons; one or more radially reciprocatable abutments provided with cuts into which fit the before-mentioned partitions; lugs integral with or fastened to the stator and forming frames for the abutments; feed-ports situated in the stator and leading' into the compression chambers; exhaust-ports situated in the stator and communicating with the explosion chambers; means adapted to cause the reciprocatable abutments to take a position across the compression and explosion chambers and to slide out of the way of the rotating pistons; means to open the outlet valves of thc pistons at and for a p1'edetermined time; means to ignite the charges in theexplosion chambers; means of supply leading to thefeed-ports and means to conduct the exhaust away from the exhaust ports; substantially as describe(1 3. In a rotary explosive engine, a stator having a cylindrical rim; an annularly grooved rotor mounted on said rim forming a circular chamber with the same, hollow pistons carried by the rotor and situated across the chamber formed by the stator and the rotor; partitions carried by the rotor and the pistons and dividing the champistons into compression and explosion chambers in such a manner that the compression chambers run parallel to the explosion chambers and within the same radlus;

inlet "and outlet valves situated in the pistons, the inlet valves facing the compres sion chambers, and the outlet valves facing the explosion chambers; radially reciprocat- ,able abntments )rovided with cuts into which fit the be lugs integral with or fastened to the stator and forming frames for the abutments; feedports located in the stator and leading into the compression chambers; exhaust-ports located in the stator and communicating with the explosion chambers; means adapted to cause the abutments to slide into the combers formed by the stator, the rotor and the ore-mentioned partitions; f

pression and explosion chambers and out of In testimony whereof I have si ed mj the way. of the rotatin istons; means to name in the presence of the subser ing witopen theoutlet valves o t e pistons; means nesses. to ignite the charges; means of supply lead- FREDERICK UHTBROCK. 5 ing to the feed-ports and means to conduct Witnesses:

the exhaust awa from the exhaust-ports; E'rsoN L. FREESE, substantially as escrbed. LINCOLN A. BOBTHWIQK. 

